<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>cache datagrid   </title>

    <link rel="stylesheet" type="text/css" href="/easyui.css">
    <link rel="stylesheet" type="text/css" href="/icon.css">
    <link rel="stylesheet" type="text/css" href="/demo.css">
    <script src="/jquery.min.js"></script>
    <script src="/jquery.easyui.min.js"></script>
</head>
<body>
<h2>Cache Editor for DataGrid</h2>
<p>This example shows how to cache the editors for datagrid to improve the editing speed.</p>
<div style="margin:20px 0;"></div>

<table id="dg" class="easyui-datagrid" title="Cache Editor for DataGrid" style="width:700px;height:auto"
       data-options="
				iconCls: 'icon-edit',
				singleSelect: true,
				toolbar: '#tb',
				onClickRow: onClickRow
			">

</table>
<thead>
<tr>
    <th  data-options="field:'itemid',width:80,halign:'center'" >编码</th>
    <th  data-options="field:'listprice',width:80,align:'right',halign:'center'">名称</th>
    <th data-options="field:'attr1',width:250,halign:'center'">价格</th>
</tr>
</thead>
<tbody>
<tr>
    <td>001</td><td>名称1</td><td>2323</td>
</tr>
<tr>
    <td>002</td><td>名称2</td><td>4612</td>
</tr>
<tr>
    <td>002</td><td>名称2</td><td>4612</td>
</tr>
<tr>
    <td>002</td><td>名称2</td><td>4612</td>
</tr>
</tbody>
<div id="tb" style="height:auto">
    <a href="javascript:void(0)" class="easyui-linkbutton" data-options="iconCls:'icon-save',plain:true" onclick="accept()">Accept</a>
    <a href="javascript:void(0)" class="easyui-linkbutton" data-options="iconCls:'icon-undo',plain:true" onclick="reject()">Reject</a>
    <a href="javascript:void(0)" class="easyui-linkbutton" data-options="iconCls:'icon-search',plain:true" onclick="getChanges()">GetChanges</a>
</div>
<script type="text/javascript">
    $("#dg").datagrid({

    });
</script>
<script type="text/javascript">

    (function($){
        function getCacheContainer(t){
            var view = $(t).closest('div.datagrid-view');
            var c = view.children('div.datagrid-editor-cache');
            if (!c.length){
                c = $('<div class="datagrid-editor-cache" style="position:absolute;display:none"></div>').appendTo(view);
            }
            return c;
        }
        function getCacheEditor(t, field){
            var c = getCacheContainer(t);
            return c.children('div.datagrid-editor-cache-' + field);
        }
        function setCacheEditor(t, field, editor){
            var c = getCacheContainer(t);
            c.children('div.datagrid-editor-cache-' + field).remove();
            var e = $('<div class="datagrid-editor-cache-' + field + '"></div>').appendTo(c);
            e.append(editor);
        }

        var editors = $.fn.datagrid.defaults.editors;
        for(var editor in editors){
            var opts = editors[editor];
            (function(){
                var init = opts.init;
                opts.init = function(container, options){
                    var field = $(container).closest('td[field]').attr('field');
                    var ed = getCacheEditor(container, field);
                    if (ed.length){
                        ed.appendTo(container);
                        return ed.find('.datagrid-editable-input');
                    } else {
                        return init(container, options);
                    }
                }
            })();
            (function(){
                var destroy = opts.destroy;
                opts.destroy = function(target){
                    if ($(target).hasClass('datagrid-editable-input')){
                        var field = $(target).closest('td[field]').attr('field');
                        setCacheEditor(target, field, $(target).parent().children());
                    } else if (destroy){
                        destroy(target);
                    }
                }
            })();
        }
    })(jQuery);
</script>
<script type="text/javascript">
    var editIndex = undefined;
    function endEditing(){
        if (editIndex == undefined){return true}
        if ($('#dg').datagrid('validateRow', editIndex)){
            var ed = $('#dg').datagrid('getEditor', {index:editIndex,field:'productid'});
            var productname = $(ed.target).combobox('getText');
            $('#dg').datagrid('getRows')[editIndex]['productname'] = productname;
            $('#dg').datagrid('endEdit', editIndex);
            editIndex = undefined;
            return true;
        } else {
            return false;
        }
    }
    function onClickRow(index){
        if (editIndex != index){
            if (endEditing()){
                $('#dg').datagrid('selectRow', index)
                    .datagrid('beginEdit', index);
                editIndex = index;
            } else {
                $('#dg').datagrid('selectRow', editIndex);
            }
        }
    }
    function accept(){
        if (endEditing()){
            $('#dg').datagrid('acceptChanges');
        }
    }
    function reject(){
        $('#dg').datagrid('rejectChanges');
        editIndex = undefined;
    }
    function getChanges(){
        var rows = $('#dg').datagrid('getChanges');
        alert(rows.length+' rows are changed!');
    }
</script>


</body>
</html>